Majorat is a French term for an arrangement giving the right of succession to a specific parcel of property associated with a title of nobility to a single heir, based on male primogeniture. A majorat (fideicommis) would be inherited by the oldest son, or if there was no son, the nearest relative. This law existed in some European countries and was designed to prevent the distribution of wealthy estates between many members of the family, thus weakening their position. Majorats were one of the factors easing the evolution of aristocracy. The term is not used of English inheritances, where the concept was actually the norm, in the form of entails or fee tails. Majorats were specifically regulated by French law. In France, it was a title of property, landed or funded, attached to a title instituted by Napoleon I and abolished 1848.
Often the title could not be inherited if the property did not pass to the same person. Like English entails, the implications of majorats were often used in fiction to furnish complexity in plots; Balzac was especially interested in them.
In Polish-Lithuanian Commonwealth, majorat was known as ordynacja and was introduced in late 16th century by king Stefan Batory. A couple of Polish magnates' fortunes were based on ordynacja, namely those of the Radziwiłłs, Zamoyskis, Wielopolskis. Ordynacja was abolished by the agricultural reform in the People's Republic of Poland.
In Portugal it was called Morgado or Morgadio and one of the requirements to inherit a Morgado was to pass down the family name related to the Morgado. Women with no brothers could inherit a Morgado: in that case their children would inherit the mother's name. If the husband was also a Morgado, the children would inherit both names. This led to a tradition of very long family names in the Portuguese nobility.
See also 
- Minorat - same as majorat, only inheritance passed to the youngest child
- William Burge gives a full account of the French laws between Napoleon and 1838 in his Commentaries on colonial and foreign laws: generally, and in their conflict with each other, and with the law of England, Volume 2, 1838, Saunders and Benning, 1838, online from google
- Burges, 207-208
- Butler, Ronnie, Balzac and the French Revolution, pp. 113-120, 1983, Taylor & Francis, ISBN 0389204064, 9780389204060, google books